Just a personal opinion Slarti, but I'd feel better doing it now and having a lovely clean path over the summer. Nothing to stop you doing it again in Autumn but at a least there wouldn't be so much by then? The birds seem to like rummaging through old, lifted moss.

Why not sprinkle a bit of lawn sand, leave it for a fortnight, then jet-wash the black residue away.I use lawn sand on my felt-roofed garage (which collects water in spite of having the obligatory slope). Works fine.

Wilko Green Gone Super Concentrate is 1% benzalkionium chloride. If you need to use large quantities of it, try instead the 50% version BAC50 from Bonnymans (£7.50 / litre; much cheaper in larger quantities) and then dilute.

Beware: it can cause severe eye irritation (use goggles , not just safety glasses) and can be toxic to cats (they lick it off their paws)

Mike88 wrote:After jet washing pour cheap watered down bleach over the path. I do that and it keeps the moss away for a couple of years.

True, it does. But the bleach also kills the worms, and it leaves a residue which can eventually degrade into dioxin. I prefer Flash floor cleaner, which doesn't seem to harm the wife's plants. Rotary spray attachment for the jet-wash (the kind that looks like an upturned bucket) is also useful.

That's all right for the hard surfaces, but I switch to one of those poncy expensive moss killers on my gravel drive - a £23 can does about four tennis courts (equivalent - not that I have a tennis court, you understand. Not even a small one. ).

Mike88 wrote:After jet washing pour cheap watered down bleach over the path. I do that and it keeps the moss away for a couple of years.

True, it does. But the bleach also kills the worms, and it leaves a residue which can eventually degrade into dioxin. I prefer Flash floor cleaner, which doesn't seem to harm the wife's plants. Rotary spray attachment for the jet-wash (the kind that looks like an upturned bucket) is also useful.

That's all right for the hard surfaces, but I switch to one of those poncy expensive moss killers on my gravel drive - a £23 can does about four tennis courts (equivalent - not that I have a tennis court, you understand. Not even a small one. ).

BJ

While you are correct about bleach giving off dioxin I believe it is the substance itself rather than degradation that is the cause. Also garden fires give off dioxin. Weedkillers and many other garden products are also detrimental to health and I wouldn't be surprised if moss killers are also equally dangerous. I'm sticking to bleach as it applied in the open air and is probably no more dangerous than other products used in the garden.